把select用CSS做成平面的!
------解决方案--------------------
<span style= "border:1px solid #999999; border-top:0px; width:1px ">
<select style= "margin:-2px ">
<option value= "0 " selected= "selected "> 1 </option>
<option value= "1 "> 2 </option>
<OPTION value= "2 "> 3 </OPTION>
</select>
</span>